GF07.61-P-3025AM O2 Sensor Heater, Function

GF07.61-P-3025AM O2 Sensor Heater, Function
ENGINE 113.990 in MODEL 211, 219
ENGINE 113.991 in MODEL 215, 220
ENGINE 113.992 in MODEL 230 up to Model Year 2008
ENGINE 113.993 in MODEL 463 up to 31.5.12
ENGINE 113.995 in MODEL 230 up to Model Year 2008





B11/4 Coolant temperature sensor
G3/3 Left O2 sensor, before TWC
G3/4 Right O2 sensor upstream TWC
G3/5 Left O2 sensor downstream TWC
G3/6 Right O2 sensor downstream of TWC
K40/4 Passenger-side fuse and relay module (model 230)
K40/7 Right front fuse and relay module (model 215, 220)
L5 Crankshaft position sensor
N3/10 ME control unit
N10/1 Driver-side SAM control unit with fuse and relay module (models 211, 219)
N10/1 Front signal acquisition and actuation module (SAM) (model 463)

The purpose of the O2 sensor heater is to rapidly heat up the O 2 sensors to their operating temperature while preventing damage to the sensor ceramic through the relevant heat control.

The O2 sensor heater is actuated and pulsed by the ME control unit via a ground signal.

The voltage supply for the O 2 sensor heaters is provided via the ME control unit by the relevant fuse and relay module or SAM.

The sensor heater is switched off at coolant temperatures below approx. 20°C and at high engine speeds as a protect ion for the sensor ceramic.

The power absorption capacity of the O 2 sensor heater from an exhaust gas temperature of 350°C is less than 7 W.
The current in the cold state is increased by the factor 4.